We found these at several sites near Tulamben. Like other Favorinus species, these prey on the eggs on other euthyneruan mollusks.
Below a Favorinus japonicus and F. mirabilis are both near a couple of small eolid egg masses.
Seeing a rather old and ratty looking pink egg mass of Hexabranchus sanguineus on the slope at Baturinggit, I took a closer look and found these two Favorinus eating the eggs.
These two were on a bubble egg mass at Tianyar.
On prey egg mass at Melasti, November 2024.
Created 21
May 2019
Updated 24 June 2025